Lubricating device



(No Moden V P. F. SWAIN..

LUBRIGATING DEVICE.

No. 302,052. Patented vJuly 15, 1884.

UNITI-gn STATES! PATENT 'FRED n. sWAIN, or CHICAGO, ILLINOIS.

LUBRICATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 302,052, dated July 15, 1884.

Application filed March 2S, 1884.

T a/ZZ whom t may concern:

Be it known that I, FRED F. SWAIN, of Chicago, in the county of Cook and State of Illinois,have invented a new and useful Improvement in Lubricating Devices, of which the following is a specification, reference being had to the accompanying drawing.

This invention relates to lubricators for bearings and engine connectionsin ,which solid lubricating material is used in the form of a cartridge, according to the patent of W. J. Faul, No. 214,640, dated April 22, 1879.

The object of my invention is more especially to adapt such'lubricators for use in the crank-wrist connections of locomotives and other engines Where it is desirable to prevent the cartridge from being thrown back from the crank-pin by the movement of the crank and connecting-rod.

The invention consists in the combination, with the grease-cartridge, of a piston attached to said cartridge, and a cylinder which receives the said piston and the cartridge, and

which is to beV attached to the rodconnection or other bearing, and in which there is formed behind the said piston an air-cushion which resists the ten dency to the backwardmovement of the said piston and the cartridge.

The invention further consists in the conibination of the said cylinder and piston land adaptation of the same to the cartridge, as hereinafter described, whereby an air-jacket is formed between the shell of the cartridge and the sides of the cylinder, for containing air to serve as a non-conductorto'preivent the grease from being softened by the or other containing material, and a lling of Y lubricating material that will remain solid at ordinary atmospheric temperature, and which is the subject of Patent No. 214,640, hereinbefore referred to.

(No model.)

D designates the piston, of wood or other suitable inexpensive material, of .larger diameter than the'cartridge C, connected with the upper end ofthe cartridge concentric therewith in any suitable manner-as, .for instance, by being provided with a concentric neck, c, which is fitted tightly into the upper end of the shell of the cartridge.

E is the cylinder to which the piston C is fitted to Work with sufficient freedom to allowr the cartridge to keep in contact with the crank-pin or journal. This cylinder is firmly secured to the strap A, or to the bearing concentric with the opening ac, and it is furnished with a cover or head, E', which should be air-tight, or so nearly so that air may be confined between it and the piston to form an air-cushion, E2. The -said cover may have such a vent provided in it-as by a very minute hole, c-as to prevent the formation of insure the descent of the grease-cartridge and its piston, and keep the grease in contact with the crank-pin or journal, and the withdrawal of the grease from contact with the crank-pin or journal with the oscillation or vibration of the'moving parts will be prevented by the' resistance of the air in the air-cushion E2. which prevention will'be to some extent aided by the friction of the piston in the cylinder.

It is obvious that, so far as the effect 0btained by the air-cushion is considered, the cylinder E need not be any larger than the cartridge is necessary for the free descent or passage of the latter; but when the cylinder is made considerably larger, as shown in the drawing, an air-jacket, F, is producedl containing a body of air, which serves as a nonconducting protection to the grease against outside heat.

What I claim as my invention, and desire'to secure by Letters Patent, is-

IDO I l. yThe combination, with the grease-carv tridge and a surrounding covered` cylinder having a vent in its cover, of the piston at;

taehed to the cartridge and fitted to the said piston :is fitted, and between which and the cylinder, and between which and the head or said cartridge a non-conducting air-jacket is 1o cover of the said cylinder there is formed an formed, substantially as and for the purpose air-cushion, substantially as and for the purherein described.

5 pose herein described. FRED F. SVVATN.

2. The combination, with the grease-ear# XVitnesses: tridge7 of a piston of larger diameter than the FREDK. HAYNES,

said cartridge7 :md a cylinder to which the said MATTHEW POLLOCK. 

